Chrobak Karolina + Jakub

I just found Karolina Chrobak, married to Jakub Chrobak. She was sister of Franciszek ROLL (born 1890) who lived in Chicago. Karolina must have been born around 1885-1895 (still lived in 1940). She had another brother: ROLL, Joszef, Chicago. Polish or Hungarian immigrants at the beginning of 1900. Any relation?